diff --git a/include/extractor/profile_properties.hpp b/include/extractor/profile_properties.hpp
index 15e90e70e..f234e8202 100644
--- a/include/extractor/profile_properties.hpp
+++ b/include/extractor/profile_properties.hpp
@@ -28,7 +28,7 @@ struct ProfileProperties
         : traffic_signal_penalty(0), u_turn_penalty(0),
           max_speed_for_map_matching(DEFAULT_MAX_SPEED), continue_straight_at_waypoint(true),
           use_turn_restrictions(false), left_hand_driving(false), fallback_to_duration(true),
-          weight_name{"duration"}, call_tagless_node_function(true)
+          weight_name{"duration"}, class_names{}, call_tagless_node_function(true)
     {
         std::fill(excludable_classes.begin(), excludable_classes.end(), INAVLID_CLASS_DATA);
         BOOST_ASSERT(weight_name[MAX_WEIGHT_NAME_LENGTH] == '\0');